基于电主轴的高速轴承及其热分析

High speed bearings and its thermal analysis of motorized spindle

高速加工需要高转速的机床,电主轴作为机床高速化的发展方向,在高速加工中得到越来越广泛的应用。高速轴承技术是电主轴的关键技术,其技术水平决定了电主轴的转速及承载能力。同时,轴承的摩擦功率产生的热量,使得电主轴温度升高,产生一定热应力和热变形,影响加工精度。因此,有必要对轴承的摩擦功率进行深入研究。研究了电主轴中几种常见的轴承支撑技术,从理论和实际应用上分析了其摩擦功率大小,可以为电主轴的轴承设计提供依据。

High speed machining needs high rotating speed machine tool,motorized spindle is the developing aim of high speed machine tools ,has broadly applied in high speed machining. High speed bearings are the pivotal technology in motorized spindle,the technology level of bearings limit rotating speed and loading capacity in motorized spindle ,and the friction power of bearings bring heat,cause temperature increasing So motorized spindle is in thermal stress and brought thermal distortion,which influence machining precision of motorized spindle. It is essential to investigate friction power of bearings deeply. Bearings technologies are studied,friction power are calculated based on theory and application, which provide theory supply for bearings design of motorized spindle.